A splendid paper fold that you make from a simple square of paper, and decorate yourself!

I found this template on sale online (for $8.50) very handy to craft a custom version using digital tools: https://www.leaplingstudio.com/product-page/downloadable-valentine-s-puzzle-purse-template

I also found those folding instructions also very handy: https://royalmail500years.blob.core.windows.net/media/1696/rmg-valentines-template-instructions.pdf

In order to preserve the opacity/transparency of the layer while using the bucket fill tool, you can click the "Lock Transparency" button in the layers dialog.